Other Comprehensive Income (Loss) - Schedule of Accumulated Other Comprehensive Income (Loss) In Equity (Details) - USD ($) $ in Millions	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Stockholders' equity	$ 9,495	$ 9,348	$ 9,346	$ 9,670	$ 9,957	$ 10,237
Accumulated other comprehensive loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Stockholders' equity	(27)	$ (20)	(47)	$ (19)	$ (28)	$ (12)
Foreign currency translation adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Stockholders' equity	(35)		(57)
Unrealized gain on post-retirement benefit obligations | Post-retirement healthcare obligations
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Stockholders' equity	7		10
Unrealized gain on hedging instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Stockholders' equity	$ 1		$ 0